How to populate one-to-many/many-to-one tables with symfony2 forms? - forms

Question

I'm new in Symfony and I'm stuck with populating one-to-many/many-to-one tables.
I managed to display the form but when I submit it I got the following error:
Found entity of type AppBundle\Entity\Products on association AppBundle\Entity\Customers#customers_products, but expecting AppBundle\Entity\CustomersProducts
Here is my code:
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use AppBundle\Entity\CustomersProducts;
/**
* Customers
*
* #ORM\Table(name="customers")
* #ORM\Entity(repositoryClass="AppBundle\Repository\CustomersRepository")
*/
class Customers
{
/** #ORM\OneToMany(targetEntity="CustomersProducts", mappedBy="customers") */
protected $customers_products;
public function __construct()
{
$this->customers_products = new \Doctrine\Common\Collections\ArrayCollection();
}
public function getCustomersProducts()
{
return $this->customers_products->toArray();
}
public function setCustomersProducts($customers_products)
{
if (count($customers_products) > 0) {
foreach ($customers_products as $i) {
$this->addCustomersProducts($i);
}
}
return $this;
}
public function addCustomersProducts( $customers_products)
{
$this->customers_products->add($customers_products);
}
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="name", type="string", length=255)
*/
private $name;
/**
* #var string
*
* #ORM\Column(name="ip", type="string", length=255)
*/
private $ip;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
* #return Customers
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
/**
* Set ip
*
* #param string $ip
* #return Customers
*/
public function setIp($ip)
{
$this->ip = $ip;
return $this;
}
/**
* Get ip
*
* #return string
*/
public function getIp()
{
return $this->ip;
}
}
Products.php:
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* Products
*
* #ORM\Table(name="products")
* #ORM\Entity(repositoryClass="AppBundle\Repository\ProductsRepository")
*/
class Products
{
/** #ORM\OneToMany(targetEntity="CustomersProducts", mappedBy="products") */
protected $customers_products;
public function __construct()
{
$this->customers_products = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="name", type="string", length=255)
*/
private $name;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
* #return Products
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
}
CustomersProducts.php
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* CustomersProducts
*
* #ORM\Table(name="customers_products")
* #ORM\Entity(repositoryClass="AppBundle\Repository\CustomersProductsRepository")
*/
class CustomersProducts
{
/**
*
* #ORM\ManyToOne(targetEntity="Customers", inversedBy="customers_products")
* #ORM\JoinColumn(name="customer_id", referencedColumnName="id", nullable=false)
*/
protected $customers;
/**
*
* #ORM\ManyToOne(targetEntity="Products", inversedBy="customers_products")
* #ORM\JoinColumn(name="product_id", referencedColumnName="id", nullable=false)
*/
protected $products;
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="version", type="string", length=255)
*/
private $version;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set version
*
* #param string $version
* #return CustomersProducts
*/
public function setVersion($version)
{
$this->version = $version;
return $this;
}
/**
* Get version
*
* #return string
*/
public function getVersion()
{
return $this->version;
}
}
CustomersType.php
<?php
namespace AppBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
class CustomersType extends AbstractType
{
/**
* #param FormBuilderInterface $builder
* #param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name')
->add('ip')
->add('customers_products', 'entity', array(
'class' => 'AppBundle:Products',
'multiple' =>true,
'expanded' => true,
'property' => 'name'
));
}
/**
* #param OptionsResolver $resolver
*/
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'AppBundle\Entity\Customers'
));
}
}